diff --git a/index.php b/index.php
index 5ff5b109..c8e4e948 100644
--- a/index.php
+++ b/index.php
@@ -58,7 +58,7 @@ setcookie(
     $session['httponly']
 );
 
-if (!isset($_SESSION['user'])) {
+if (!isset($_SESSION['user']) || is_array($_SESSION['user'])) {
     $_SESSION['user'] = new User();
 }